Microwave synthesis method was applied to the fast preparation of LiCoO2. The structure of the synthesized oxides was analyzed by using X-ray diffraction. Only single-phase LiCoO2 was obtained. Electrochemical behavio...Microwave synthesis method was applied to the fast preparation of LiCoO2. The structure of the synthesized oxides was analyzed by using X-ray diffraction. Only single-phase LiCoO2 was obtained. Electrochemical behaviors of LiCoO2 were investigated by charge-discharge cycling properties in the voltage range of 3.004.35 V（（vs Li）.） The results show that the prepared LiCoO2 powders calcinated at 900 ℃ for 120 min exhibit an initial charge and discharge capacity of 168 and 162 mA·h·g-1 at 0.1C current rate, respectively, as compared to 159 and 154 (mA·h·g-1) of LiCoO2 synthesized by conventional means. In addition, more than 95% of the capacity is retained （even） after 10 cycles. But with the increase of calcinating time, its electrochemical properties deteriorate. Compared with the conventional method, the microwave heating method is simple, fast, and with high energy efficiency.展开更多
New cADPR mimic 5 that integrates the simplified nucleobase and ribose was designed and synthesized by using Cu（I）-catalyzed Huisgen [3＋2] cycloaddition to build the simplified triazole nucleobase and microwave-ass...New cADPR mimic 5 that integrates the simplified nucleobase and ribose was designed and synthesized by using Cu（I）-catalyzed Huisgen [3＋2] cycloaddition to build the simplified triazole nucleobase and microwave-assisted reaction to carry out intramolecular pyrophosphorylation. Primary biological investigation showed that the introduction of an ether strand to replace northern and southern riboses could retain calcium inducing activity, but the introduction of a carbon strand to replace the northern ribose could lead to decreased activity.展开更多
An optimized approach for the synthesis of N^1-ethoxymethyl-substituted cyclic inosine diphosphoribose（cIDPRE）,an analogue of cyclic adenosine diphosphoribose（cADPR）,has been developed via microwave-assisted intra...An optimized approach for the synthesis of N^1-ethoxymethyl-substituted cyclic inosine diphosphoribose（cIDPRE）,an analogue of cyclic adenosine diphosphoribose（cADPR）,has been developed via microwave-assisted intramolecular cyclization. The target compound has been successfully obtained through N^1-substitution,phosphorylation,cyclization and deprotection.By using this method,8-amino and bromo-substituted cIDPRE analogues were successfully obtained in good yield.The new approach has greatly shortened the synthetic route and enhanced the overall efficiency.展开更多
文摘Microwave synthesis method was applied to the fast preparation of LiCoO2. The structure of the synthesized oxides was analyzed by using X-ray diffraction. Only single-phase LiCoO2 was obtained. Electrochemical behaviors of LiCoO2 were investigated by charge-discharge cycling properties in the voltage range of 3.004.35 V（（vs Li）.） The results show that the prepared LiCoO2 powders calcinated at 900 ℃ for 120 min exhibit an initial charge and discharge capacity of 168 and 162 mA·h·g-1 at 0.1C current rate, respectively, as compared to 159 and 154 (mA·h·g-1) of LiCoO2 synthesized by conventional means. In addition, more than 95% of the capacity is retained （even） after 10 cycles. But with the increase of calcinating time, its electrochemical properties deteriorate. Compared with the conventional method, the microwave heating method is simple, fast, and with high energy efficiency.
基金National Natural Sciences Foundation of China (Grant No. 90713005,20910094)the Ministry of Education of China (Grant No. 200800010078)
文摘New cADPR mimic 5 that integrates the simplified nucleobase and ribose was designed and synthesized by using Cu（I）-catalyzed Huisgen [3＋2] cycloaddition to build the simplified triazole nucleobase and microwave-assisted reaction to carry out intramolecular pyrophosphorylation. Primary biological investigation showed that the introduction of an ether strand to replace northern and southern riboses could retain calcium inducing activity, but the introduction of a carbon strand to replace the northern ribose could lead to decreased activity.
基金National Natural Science Foundation of China (Grant No.20910094) Ministry of Education of China(Grant No.200800010078)
文摘An optimized approach for the synthesis of N^1-ethoxymethyl-substituted cyclic inosine diphosphoribose（cIDPRE）,an analogue of cyclic adenosine diphosphoribose（cADPR）,has been developed via microwave-assisted intramolecular cyclization. The target compound has been successfully obtained through N^1-substitution,phosphorylation,cyclization and deprotection.By using this method,8-amino and bromo-substituted cIDPRE analogues were successfully obtained in good yield.The new approach has greatly shortened the synthetic route and enhanced the overall efficiency.
